Pump jack



Invenlor f1 llorne y J. E. THOMAS ,April 2l, l93.

APUMP JACK Filed May 25, 1954 5 Sheets-Sheet l Amin 21', 193 J. E, THOMAS PUMP JACK 5 Sheets-Sheet 2 Filed May 25, 1954 Inventor Thomas Apm 2E, B36 J. E. THOMAS PUMP JACK Filed May 25, 1954 3 Sheets-Sheet 3 Patented Apr. 21, 1936 UNITED STATES PUMP JACK .lohn E. Thomas, Overton, Tex., assignor of fiftyone per cent to Ben E. Thomas, Overton, Tex.

Application May 25, 1934, Serial No. 727,558

1 Claim.

The present invention relates to a pump jack and has for its prime object to provide a jack which is movable. The principle of this moving jack is when pulling rods or tubing one can clamp the polish rod, unhook the pull rods, and then move the jack out of the way as will be explained more in detail hereinafter.

Another important object of the invention resides in the provision of a mechanism for moving the jack in a thoroughly reliable and efficient Ymanner and which also affords ease of operation.

With the above and numerous other objects in view as will appear as the description proceeds, the invention consists in certain novel features of construction, and in the combination and arrangement of parts as will hereinafter be more fully described and claimed.

In the drawings:

Figure `l is a side elevation of a pump jack embodying the features of my invention, most of the conventional parts being shown` in dotted lines.

Figure 2 is a top plan view thereof.

Figure 3 is an end elevation thereof.

Figure 4 is a fragmentary perspective showing one of the racks and one of the sills.

Figure 5 is a detail sectional view taken substantially on the line 5 5 of Figure l.

Figure 6 is a side elevation of one of the stationary sills and one of the movable sills.

Figure 7 is a perspective view of one end of one of the stationary sills.

Figure 8 is a sectional view taken substantially on the line 8 8 of Figure 2.

Referring to the drawings in detail it will be seen that numerals 5 denote a pair of spaced parallel coextensive sills anchored in foundation 6 by anchor bolts 1. Angle iron rack bars are slidable on top of the sills 5 and each includes a plate 8 slidable on top of the sill and a rack forming flange 9 depending from one edge thereof. Numerals I denote the angle iron sills of the jack J illustrated by the dotted line construction in the various figures. These angle iron sills I0 are riveted or otherwise fixed to the plates 8 of the angle iron rack bars. Grooves Il are provided in the upper surfaces of the sills and these grooves are wider at the bottom than at the top. Bolts I2 have Shanks slidable through the narrow portions of the grooves and head slidable in the wider portions thereof and the Shanks of the bolts extend up through openings in the rack bars and the angle iron sills and nuts I4 are engaged on the bolts and when the nuts are tightened the rack bar and angle iron sills are clamped tightly to the stationary sills.

A shaft I5 is journalled through the stationary sills and has rack gears I6 xed thereto in mesh with the rack flanges 9.

When one desires to pull rods or tubes he can clamp the polish rod, unhook-the pull rod of the jack and loosen bolt I2 and take a wrench and use the same as a crank for the shaft I5 to turn the shaft and thereby move the jack back out of the way and also space the beam straight over the hole in just a short time and eliminate lots of danger of a man getting hurt for there is nothing in his Way.

It is thought that the construction, operation, utility and advantages of this invention will now be quite apparent to those skilled in this art without a more detailed description thereof.

The present embodiment of the invention has been described in considerable detail merely for the purposes of exempliflcation since in actual practice it attains the features of advantage enumerated as desirable in the statement of the invention and the above description.

It will be apparent that changes in the details of construction, and in the combination and arrangement of parts may be resorted to without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages.

Having thus described my invention, what I claim as new is:

In a jack supporting structure, a pair of spaced parallel sills, each having a groove longitudinally arranged therein with the lower part of the groove wider than the upper portion thereof and said upper portion opening out through the top face of the sill, a plate resting on the top face of each sill with its inner side edge projecting beyond the inner side edge of the sill, a depending flange on said side edge of the plate having rack teeth therein, va transversely arranged shaft journaled in the two sills and having one end projecting beyond one of the sills, said projecting end being adapted to receive a handle for turning the shaft, gears on the shaft meshing with the rack teeth, jack supporting plates resting on the upper faces of the first mentioned plates and connected to said plates, each jack supporting plate having an upstanding flange at its inner edge for engaging the parts of the jack, headed bolts having their heads engaging the wide lower portions of the grooves and their shanks passing through the narrow parts of the grooves and through the plates and nuts on the upper ends of the bolts, which when tightened will clamp the plates in adjusted position and when loosened will permit movement of the plates and jack by the shaft.

JOHN E. THOMAS. 

